JPS58137807A - Production of optical fiber laminate - Google Patents

Abstract

PURPOSE:To obtain a titled laminate wherein plural pieces of optical fibers are arranged and laminated with high accuracy by laminating the sheet-like rectangular bodies of a specified length and specified width produced by arranging the optical fibers in parallel at a specified pitch and fixing the same by adhering in plural stages. CONSTITUTION:Optical fiber sheets 5 produced by arranging plural pieces of optical fibers 7 in parallel at a specified pitch are inserted into the fixed-length channels of lngth (n), width (e) and depth (m) formed on the top surface of a channeled plate 1, and an adhesive resin 8 is cast therein. A press plate 3 is placed thereon and is pressed onto the plate 1 along the guides 4 to adhere and fix the sheets 5 with the resin, whereby the rectangular bodies of the length (n), and the width (e) are formed in the end parts of the sheets 5. Such bodies 5 are laminated in plural stages in a laminating frame 9 and the top part is fixed with a top cover 11 for fixing which moves along guides 10, whereby the bodies are adhered.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing an optical fiber laminate in which optical fiber sheets each comprising a plurality of optical fibers are laminated at predetermined intervals.

Generally, optical fibers come in various shapes depending on the purpose of use, such as single fibers, bundles of fibers, sheets arranged in sheets, and layers laminated at regular intervals. The present invention provides a method for manufacturing an optical fiber laminate that is arranged and laminated at regular intervals.

Conventionally, the method of laminating optical fibers is to stack cut sheets of optical fibers arranged in a sheet shape and fixed with resin at both ends in a concave formwork, and then fixed with resin to obtain an optical fiber bundle. Method: After arranging them in a sheet shape on the circumference of a drum and rolling them up, -S is fixed with adhesive resin, then removed from the drum to form an endless sheet of optical fiber, and this sheet is stacked on a concave formwork and glued. There is a method to obtain an optical fiber bundle by fixing it with resin and then cutting it in the middle of the fixed part (Special Publication No. 39-Kokukoa No. 9), and furthermore, there is a method of fixing optical fibers on the inner periphery of a skein frame having a concave form. A method of obtaining optical fiber bundles by arranging them into sheets, rolling them up continuously, stacking them, fixing them with adhesive resin, and then cutting them at the middle of the fixed part (Tokuko Shoda 3)
-da No. 43).

However, in any of the above methods, it is a matter of internal inspection to adjust the stacking interval of each tier with high precision, and the stacking state is what is called a random arrangement, resulting in a mixture of bale stacking and square arrangement. As a result, the laminated state of the optical fiber ends lacks constant pitch, and when used as a sensor, it is impossible to accurately match the positions of the input side and the output side.

Also, in normal optical fibers, the diameter of a single fiber is 3
There is a fluctuation range of about 10% to IO%, and therefore, if the fibers are arranged in contact with each other, it will naturally result in an irregular optical fiber bundle.

Furthermore, the method of laminating optical fiber sheets one by one has the disadvantage that if the optical fiber sheets are laminated in a defective manner, the lamination up to the defective portion will be wasted.

In view of the above-mentioned drawbacks, the present invention makes it possible to obtain, by a simple method, an optical fiber laminate that has high added value and is arranged and laminated with extremely high precision, although it is a batch method.

That is, in the present invention, an optical fiber sheet in which a plurality of optical fibers are arranged in parallel at a constant pitch is sandwiched between plates having grooves of constant length and width, adhesively fixed, and cured to form a rectangular shape of constant length and constant width. O is a method for manufacturing an optical fiber laminate, which is characterized by forming a rectangular body portion and stacking the rectangular body portions in a plurality of stages. Special request Aki &-/? A&, tJ
It can be manufactured using a plate with regular pitch grooves as described in No.

In the present invention, optical fiber sheets arranged at a fixed pitch are used, but the unit sheet may be one in which optical fibers are arranged in parallel in a single layer, but it is also possible to use as a unit sheet a sheet in which a predetermined number of layers are laminated in advance. can.

In the present invention, a constant pitch arrangement means that the distance between the axes of each optical fiber is constant.

That is, since the diameter of each optical fiber is uneven, it is necessary to adjust the gap between each optical fiber in order to keep the distance between the axes constant.

Next, the present invention will be explained in detail with reference to the drawings.

FIG. 1 is a schematic diagram showing an example of a jig for manufacturing a fixed length rectangular body according to the present invention. A fixed length groove (L2-i) with a length n1 radius θ and a depth m is formed on the upper surface of the grooved plate (1), and optical fiber sheets arranged at a fixed pitch in advance are inserted into the fixed length groove (k) and bonded. Pour the resin, place the holding plate (J) on top of it, and slide the holding plate (J) along the guide (4I).
) F: Play) (1) By pressing the optical fiber sheet on top and fixing the optical fiber sheet in the fixed length groove (C) with adhesive resin and curing it, dimensional changes in the subsequent process are suppressed and shrinkage of the resin is stopped. . After curing is complete, remove the rectangular body of constant length and width from the jig. Figure 1 is an external view of an optical wA111 sheet made using the jig according to the present invention.
A rectangular body (1) with a width of 11 mm is formed. Figure JA is a cross-sectional view of the optical fiber rectangular body (1) obtained by this method.
FIG. 3b is a plan view thereof. As seen in No. Jalil, the optical fibers (ri) are arranged at regular pitches in the cross section of the rectangular body (2), and are fixed and hardened with adhesive <2>. FIG. 1 is a schematic diagram showing an example of the lamination jig of 1).

The pre-formed optical fiber rectangular bodies are laminated on the lamination frame (9), and the upper part is fixed with a fixing lid (l/) that moves up and down along the guide (l), and then glued. It is necessary to use as little amount of adhesive as possible to minimize the effect of shrinkage of the adhesive. ◇ Figure 3 is a cross-sectional view of an optical fiber laminate obtained by laminating by the method of the present invention. The constant pinch property is regulated with high precision so that the distance between the axes of each optical fiber is m'. Figure 6 is a cross-sectional view of a laminate made by the conventional method, with a mixture of bale stacking and square arrangement. shows.

Next, as an example, the optical fiber diameter I! 2/Ko! ;m.

Array interval 04100m - Number of arrays: 20, number of stacked layers: 50
A stack of stages was manufactured and the error was measured.

Lamination is qv! This was done using a lamination jig as shown in J. The external dimensions of the optical fiber laminate were extremely accurate, with the arrangement direction being within ±aOaOrn of the theoretical value, and the lamination direction being within ±00-0m of the theoretical value.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing an example of a jig for manufacturing a fixed length rectangular body according to the present invention. Fig. 1 is an external view of an optical fiber sheet with fixed ends, and Fig. 3 and Fig. Fig. Jb is a plan view thereof, Fig. 3 is a schematic diagram showing an example of a jig for laminating rectangular optical fibers, and Fig. 3 is a cross-sectional view of an optical fiber laminate produced by the method of the present invention. Section IIi and FIG. 1 are cross-sectional views of the laminate produced by the conventional method.
(1) is the respective optical fiber, and (1) is the adhesive. Izumi / Diagram / Station 2 platform 3b diagram / / 4I21 , / 1 Izumi 5 (121 East 6 Figure procedure amendment (method) April 1960 (0th Japan Patent Office Commissioner Haruki Shimada 1, Incident display # #Pengsho 3-0-da 33 No. 2, Name of invention Method for manufacturing optical fiber laminate 3, Relationship with the amended case Patent applicant Mitibishi, 2-3-19 Kyobashi, Chuo-ku, Tokyo (603) Osamu Kanazawa, President and Director of Rayoshi Co., Ltd., 34, Agent Mitsubishi Rayon Co., Ltd., 2-3-19 Kyobashi, Chuo-ku, Tokyo Chowa 37th year! month 7th (Delivery date Showa! 7th capital S month 3rd)
Engraving of the statement (no changes to the contents)

Claims (1)

[Claims] An optical fiber sheet in which a plurality of optical fibers are arranged in parallel at a fixed pitch is sandwiched between plates having grooves of fixed length and width, adhesively fixed, and cured to form a rectangular body of fixed length and fixed width, A method for manufacturing an optical fiber laminate, characterized by laminating the rectangular body portions in multiple stages.